From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, Jason Wang <jasowang@redhat.com>,
eperezma@redhat.com
Subject: [PATCH RFC v5 09/13] vhost/net: avoid iov length math
Date: Sun, 7 Jun 2020 10:11:42 -0400 [thread overview]
Message-ID: <20200607141057.704085-10-mst@redhat.com> (raw)
In-Reply-To: <20200607141057.704085-1-mst@redhat.com>
Now that API exposes buffer length, we no longer need to
scan IOVs to figure it out.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/vhost/net.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 830fe84912a5..0b509be8d7b1 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -607,11 +607,9 @@ static bool vhost_exceeds_maxpend(struct vhost_net *net)
}
static size_t init_iov_iter(struct vhost_virtqueue *vq, struct iov_iter *iter,
- size_t hdr_size, int out)
+ size_t len, size_t hdr_size, int out)
{
/* Skip header. TODO: support TSO. */
- size_t len = iov_length(vq->iov, out);
-
iov_iter_init(iter, WRITE, vq->iov, out, len);
iov_iter_advance(iter, hdr_size);
@@ -640,7 +638,7 @@ static int get_tx_bufs(struct vhost_net *net,
}
/* Sanity check */
- *len = init_iov_iter(vq, &msg->msg_iter, nvq->vhost_hlen, *out);
+ *len = init_iov_iter(vq, &msg->msg_iter, buf->out_len, nvq->vhost_hlen, *out);
if (*len == 0) {
vq_err(vq, "Unexpected header len for TX: %zd expected %zd\n",
*len, nvq->vhost_hlen);
@@ -1080,7 +1078,7 @@ static int get_rx_bufs(struct vhost_virtqueue *vq,
nlogs += *log_num;
log += *log_num;
}
- len = iov_length(vq->iov + seg, in);
+ len = bufs[bufcount].in_len;
datalen -= len;
++bufcount;
seg += in;
--
MST
next prev parent reply other threads:[~2020-06-07 14:12 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-07 14:11 [PATCH RFC v5 00/13] vhost: ring format independence Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 01/13] vhost: option to fetch descriptors through an independent struct Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 02/13] vhost: use batched version by default Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 03/13] vhost: batching fetches Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 04/13] vhost: cleanup fetch_buf return code handling Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 05/13] vhost/net: pass net specific struct pointer Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 06/13] vhost: reorder functions Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 07/13] vhost: format-independent API for used buffers Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 08/13] vhost/net: convert to new API: heads->bufs Michael S. Tsirkin
2020-06-07 14:11 ` Michael S. Tsirkin [this message]
2020-06-07 14:11 ` [PATCH RFC v5 10/13] vhost/test: convert to the buf API Michael S. Tsirkin
2020-06-07 14:11 ` [PATCH RFC v5 11/13] vhost/scsi: switch to buf APIs Michael S. Tsirkin
2020-06-08 9:57 ` Stefan Hajnoczi
2020-06-07 14:11 ` [PATCH RFC v5 12/13] vhost/vsock: switch to the buf API Michael S. Tsirkin
2020-06-08 9:57 ` Stefan Hajnoczi
2020-06-08 10:17 ` Stefano Garzarella
2020-06-08 13:30 ` Michael S. Tsirkin
2020-06-08 16:26 ` Stefano Garzarella
2020-06-07 14:11 ` [PATCH RFC v5 13/13] vhost: drop head based APIs Michael S. Tsirkin
2020-06-08 3:57 ` Jason Wang
2020-06-08 6:45 ` Michael S. Tsirkin
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